Collision strengths for transitions of Ni XXI
Collision strengths for transitions of Ni XXI
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Ni XXI 转变的碰撞强度
DOI：
10.1140/epjd/e2013-40255-6
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发表时间：
2013-12
影响因子：
1.8
通讯作者：
Sai Du
中科院分区：
文献类型：
--
作者：
Gang Jiang;Leifeng Cao;Wenhui Wang;Sai Du
In this paper, we use Dirac R-matrix theory to calculate the collision strengths for electron impact excitation of Ni XXI with the Dirac atomic R-matrix code (DARC), which includes contributions of resonances, channel coupling, and relativity. A DARC calculation has been performed for transitions among 86 levels of (1s2) 2s22p4, 2s2p5, 2p6and 2s22p33l(l= 0, 1, 2) configurations of Ni XXI. The GRASP code has been adopted for the description of target. A comparison is made with the results of Bhatia et al. for the collision strengths of five incident energies, 85, 170, 255, 340, and 425 Ryd, which use distorted wave calculations that do not include channel coupling. Effective collision strengths are calculated by averaging collision strengths over a Maxwellian velocity distribution. The accuracy of our calculations is assessed.
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影响因子：
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作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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DOI：
10.1086/425915
发表时间：
2005
期刊：
The Astrophysical Journal Supplement Series
影响因子：
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